Study of complex protection of steel structures with environment-friendly paint systems

Byly navrženy dva typy nátěrových systémů určených pro těžkou antikorozní ochranu. První typ se skládal ze tří druhů nátěrových hmot: a) zinkem plněná základní antikorozní epoxidová nátěrová hmota; b) plnicí antikorozní epoxidová nátěrová hmota; c) dvousložkový polyurethanový vrchní email. Druhý typ nátěrových systémů se skládal ze dvou druhů nátěrových hmot: a) plnicí antikorozní epoxidová nátěrová hmota; b) dvousložkový polyurethanový vrchní email.Dokončená práce s úspěšnou obhajobo

TiO2 and ZnO Nanoparticles in Photocatalytic and Hygienic Coatings

Antimicrobial paints were based on the aqueous acrylic dispersion and various nanoparticles of zinc oxide and titanium dioxide. Antimicrobial ability and photoactivity were assumed in these paints. It was possible to observe the photoactivity thanks to change of organic dyes due to oxidative-reductive reaction. The best photocatalytic effect showed the coating containing the mixture of the first type of TiO2 and nano-ZnO despite the fact that the first type of TiO2 was not better in the photocatalytic test than the other types of TiO2. The agar dilution method was used to test antimicrobial ability. The Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus were chosen as test bacteria and Penicillium chrysogenum and Aspergillus niger as test molds. The antimicrobial effect of coatings with the mixture of the first type of TiO2 and nano-ZnO was the best of all the tested samples

Nanočástice TiO2 a ZnO ve fotokatalytických a hygienických nátěrech

Antimicrobial paints were based on the aqueous acrylic dispersion and various nanoparticles of zinc oxide and titanium dioxide. Antimicrobial ability and photoactivity were assumed in these paints. It was possible to observe the photoactivity thanks to change of organic dyes due to oxidative-reductive reaction. The best photocatalytic effect showed the coating containing the mixture of the first type of TiO2 and nano-ZnO despite the fact that the first type of TiO2 was not better in the photocatalytic test than the other types of TiO2. The agar dilution method was used to test antimicrobial ability. The Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus were chosen as test bacteria and Penicillium chrysogenum and Aspergillus niger as test molds. The antimicrobial effect of coatings with the mixture of the first type of TiO2 and nano-ZnO was the best of all the tested samples.Antimikroibiální nátěry byly založeny na vodních akrylových disperzíc s proměnlivou koncentrací nanočástic TiO2 a ZnO. Byla testována antimikrobiální a fotokatalytická účinnost těchto nátěrů. Pro testování antimikrobiální aktivity byla použita agarová diluční metoda. Byly testovány bakterie Escherichia coli, Pseudomonas aeruginosa a Staphylococcus aureus, z plísní to byly Penicillium chrysogenum a Aspergillus niger. Ze všech testovaných vzorků nátěrů byly nejlepší směsi prvního typu TiO2 a nanočástic ZnO

Influence of shelf-life stability on antimicrobial efficiency of aqueous acrylic dispersion containig nano oxides and organic biocide

Antimicrobial paints were formulated based on various nano particles of zinc oxide and organic biocide. The aqueous acrylic dispersion was used as a binder for this system. A control paint without nanoparticles was formulated. The antimicrobial ability, shelf-life stability and photoactivity were assumed in these paints based on nano zinc oxide with organic biocide. It is possible to observe the photoactivity thanks to a change in organic dyes due to oxidative-reductive reaction. The agar dilution method was used for a test of the antimicrobial ability. The Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus were chosen as test bacteria. A great antibacterial inhibition of Escherichia coli and Staphylococcus aureus sis exhibited both coatings, and they are antimicrobially active after 12 months of shelf stability